Returns a new array with $n elements removed from the left.

Use array_slice() to remove $n elements from the left.
Omit the second argument, $n, to only remove one element.

代码实现

function drop($items, $n = 1)
{
  return array_slice($items, $n);
}

使用样例

drop([1, 2, 3]); // [2,3]
drop([1, 2, 3], 2); // [3]